categories are fairly broad-based. For example: Human Interference
ranges from trapping of an owl for relocation to the felling of
nest trees. In this particular case, it is highly likely that
the value for Human Interference is much lower than the actual
number, as many people collect "orphaned" owls and hawks
that do, in fact, have parents caring for them.
The "Infection" category is associated with bacterial
and viral infectious diseases that are not a result of other causes
of distress. This includes West Nile virus and bumblefoot problems.
The "Old Injury" category correlates to individuals
that have survived an initial trauma or physical flaw, but have
declined in health over an extended period of time as a result
(e.g. eye trauma resulting in glaucoma or cataracts due to age
causing emaciation or grounding).